How so? Game server ID is something you added. There is no game server ID in TNet. Servers are identified by internal+external IP pairs. You added the ID, so only you know what it does and how it does it -- and more importantly, how they stay unique and avoid collision.
I'm saying it's your change, something you added, so keep changing it until it's what you need it to be. Not sure what you expect me to do here.